[Bug 1850678] Re: flash-kernel only updates the dtb of the Pi it's on

[Launchpad Bug Tracker]

This bug was fixed in the package flash-kernel - 3.98ubuntu6

---------------
flash-kernel (3.98ubuntu6) focal; urgency=medium

  * Remove redundant DTB-Kernel-Version field
  * Remove redundant copying of boot dtb
  * Fix mkimage_kernel tests
  * Add "pi" value for the "Method" field which copies all dtbs and overlays
    to the boot partition and provides defaults for the boot paths of the
    kernel, initrd, and u-boot script. This fixes upgrades to support the Pi 4
    on Bionic (LP: #1850678)
  * Update pi bootscript to support all flash-kernel vars, including
    calculated devtype and partition for future USB boot support
  * Add entry for Raspberry Pi 3A+ (LP: #1841955)

 -- Dave Jones <dave.jones at canonical.com>  Thu, 07 Nov 2019 14:02:26
+0000

** Changed in: flash-kernel (Ubuntu)
       Status: In Progress => Fix Released

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Title:
  flash-kernel only updates the dtb of the Pi it's on

Status in flash-kernel package in Ubuntu:
  Fix Released

Bug description:
  Specific to the Raspberry Pi, when flash-kernel is executed to copy
  things to the boot partition, only the dtb of the Pi that it is being
  executed on is copied. In order to support moving the SD card between
  Pi models, flash-kernel needs to copy *all* dtbs provided by the
  kernel to the boot partition.

  Consider the case of SRUing Pi 4 support to Bionic. Bionic does not
  currently support the Pi 4, so a user must necessarily boot their
  Bionic image on, say, a Pi 3. If they then upgrade to a kernel
  supporting the Pi 4, flash-kernel will only copy the dtb for the Pi 3
  to the boot partition. If the card is then moved to a Pi 4 it will
  fail to boot due to a missing device-tree.

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